CODE EXAMPLE FOR SHELL

fsl flirt

#!/bin/sh

# Some viewers (like MRIcron) do not handle anisotropic voxels well. 
# FSL can easily convert an image with anisotropic voxels into one 
# with isotropic voxels in the same space using -applyisoxfm

# reslice current image into 1mm isotropic
flirt -in anat_CT_axial -ref anat_CT_axial -applyisoxfm 1 -out anat_CT_axial_1mm

# reslice current image into 0.5 mm isotropic voxels.
flirt -in anat_CT_axial -ref anat_CT_axial -applyisoxfm 0.5 -out anat_CT_axial_0.5mm